Compressed-air pump



March 18, 1930. c. c. MARTIN 1,750,719

COMPRESSED AIR PUMP Filed Dec. 8, 1928 3 Sheets-Sheet 1 \ENM Inventor March 18, 1930. c. c. MARTIN COMPRESSED AIR PUMP 3 Sheets-Sheet 2 Filed Dec ,8, 71928 Kym/(1%;

Attornqy March 18, 1930. c. c. MARTIN COMPRESSED AIR PUMP Filed Dec. 8, 1928 3 Sheer,s-Sheer. 3

Patented Mar. 18, 1930 1 NI ED STATES PATENT OFFICE C. Rm, HILLSBOBO, TEXAS, ASBIGNOB OF ONE-BALI '10 THOB. W.

MITCHELL, 0F EILLSBORO, TEXAS COMPRESSED-AIR PUB? Application filed December 8, 1828. Serial 110.884,?08.

The present invention relates to improvements in pumps and 'has reference more particularly to a compressed air pump for raising water or oil by the action of compressed 6 air in a simple, effective and reliable manner.

One of the important objects of the present invention is to provide a compressed air pump wherein a sliding spring pressed iston is arranged within a cylinder in suc a manner as to normally cut off communication between the compressed air chamber and the li uid chamber, the piston being moved to a lowered osition when the air is sufliciently compressed to actuate a pop valve, so that compressed air will enter the li uid chamber to raise the liquid upwardly t rough the discharge pipe.

Still a further object is to provide a compressed air pump of the above mentioned character that will be simple in construction,

inexpensive, strong and durable, and further well adapted to the purpose for which it is desi ed.

Other objects of the invention will become apparent as the nature of the invention proceeds and when taken in connection with the accom anying drawings.

In the accompanying drawings, formm a part of this application, and wherein like reference characters designate like parts throughout the several views:

Figure 1 is a view partly in elevation and partly in section of one form of the compressed air pump.

Figure 2 1s a sectional view through the cylinder showing the osition of the piston to permit compressed air to enter into the water or oil chamber below the cylinder.

Figure 3 is a fragmentary vertical sectional view through a modification of the pump structure.

- Fi ure 4 is a sectional view taken a proximatefy on the line 4-4 of Figure 3, ooking downwardly. v

Figure 5 is a vertical sectional view taken approximately on the line 5- -5 of Figure 4, for more clearl disclosing the cylinder vconstruction of th s type 0 pump shown in Fi re 3.

igure 6 is a view similar to Figure 3, of a fuplther modification of the pump structure, an 1 Figure 7 is a transverse section taken approximately on the line 77 of Figure 6.

In the drawings, with reference more particularly to Figures 1 and 2, the numeral 1 designates enerally a sectional cylindrical water or oi chamber, that is disposed vertically within a well. A valve head 2 is arranged on the lower open end of this cham- W her, and a verticall -movable valve 3 is arranged in this hea to permit the liquid to enter this chamber, but preventing the liquid from being discharged from the chamber through the inlet 4. A 1i uid discharge nippie 5 extends from the si e of the head 2, 1n the manner as clearly shown in Figure 1, and has connection wit a vertically disposed discharge pipe 6 that projects above the surface of the well A, and terminates at its-upper end in a discharge portion 7.

Arranged on the upper end of the water or oil chamber 1 is the cylinder 8, the lower end thereof being threaded on the upper end of the uppermost section of the chamber 1, an annnular flange 9 being formed within the lower end portion of the cylinder for abutting engagement with the upper end of the chamber as shown in Figure 2. This flange 9 is of such size as to form a central restricted compressed'air discharge opening 10. The n per end of the cylinder 8 is open and detac ably secured thereon is the head 11,

An internally threaded neck 12 projects upwardl from the central portion of the head 11 or receiving the lower threaded end of a vertically disposed compressed air and supply pipe 13, the upper end of which has communication with a horizontal compressed air pipe 14. An air compressor denoted generally by the numeral 15 of any conventional constructionis connected up with the outer end of the horizontal pipe 14, and a suitable check valve 16 is arranged in this horizontal pipe 14.

The head 11 is formed with a compressed air passage 17 and a spring pressed pop valve 18 is mountedon the under side of the head 11 directly beneath the opening 7 for nor mally closing the same. The mounting for this spring pressed pop valve is indicated at 19 and normally the op valve cuts ofi' communication between t e compressed air pipe 13 and the cylinder 8.

The central portion of the cylinder 8 is enlarged, and a series of spaced vertical air passages'20 are formed in the enlarged central portion of the cylinder 8, the upper ends of these passages having communication with the upper interior portion of the cylinder while the lower ends of the passages are directed inwardly for communication with the lower end portion of the cylinder as shown at 21 and 22 respectively, in Figure 2.

Arranged for reciprocatory movement within the cylinder 8 is the piston 23 and the upper portion of this piston is formed with a central cavity 24, to receive the pop valve 18 and its housing or mounting 19, when the piston is disposed in its normally raised position in the cylinder. An expansible coil" I spring is arranged within the lower portion of the cylinder for disposition between the flange 9 and the bottom of the piston for normally holding the piston in its raised position in the cylinder.

The operation of the pump shown in Figures 1 and 2 may be briefly described as follows: The liquid enters the chamber 1 through the opening 4, and the valve 3 revents egress of the liquid through the in ct opening 4. Compressed air passes through the pipes 13 and 14 and when the air is sufliciently compressed to open the pop valve 18, the compressed air will enter the cylinder 8 and will force the piston 23 downwardly against the tension of the coil spring 25 to the position shown in Figure 2, so that the compressed air will enter the openings 20 and pass downwardly through the passageways 20. The compressed air will be discharged through the opening 22 into the lower portion of the cylinder and will enter the chamber 1 through the openings therein and'the air under pressure will act on the liquid in the chamber 1 to force the same upwardly through the discharge pipe 6 out of the well.

\Vhen the air pressure drops below a predetermined amount, the pop valve 18 will close, and the spring 25 will ,return the piston 23 to its normally raised position covering the openings 21 as shown in Figure 1.

With references now to Figures 3, 4, and 5 of the drawings, wherein there is shown another form of the compressed air pump, the numeral 26 denotes enerally a sectional liquid chamber that is ormed in its bottom with a liquid inlet opening 27, and a gravity valve 28, is arranged within the lower portion of the chamber for disposition over the inlet 27. The chamber 26 is also of sectional construction and the upper end thereof is opened.

A cylinder 29 is detachably secured at its lower end on the upper open end of the liquid chamber 26, and the bottom of this cylinder is formed with a central opening from which depends the internally t readed neck 30, into which is secured the up er end of a pipe 31, that projects downwardly in the water or oil chamber 26, the lower end of this pipe terminating at a point above the cage provided for the valve 28. This ca e is denoted by the reference character 32 an is adapted to limit the upward movement of the valve during the fiow of the liquid into the chamber 26 through the inlet opening 27. A bell-like extension 33 is formed on the top of the cylinder 29, while the top of the cylinder is formed with a threaded socket 34, the bottom of which is provided with a com ressed air outlet opening '35 that is norma y closed by a pop valve 36, that is mounted within a cage 37, that depends from the under side of the top wall of the cylinder, and a coil spring is associated with this valve 36 for normally holding the same in a closed position as shown in Figures 3 and 5.

The cylinder 39 is formed with a series of spaced vertically extending liquid passages 38 that extend for the full length of the cylinder. The cylinder is also provided with vertically extending spaced compressed air passages 39 that terminate at their upper ends at the intermediate portion of the cylinder, and at their lower ends at a point above the bottom of the cylinder. The upper ends of the air passages 39 communicate with openings 40 formed in the inner wall of the cylinder, while the lower ends of the said passages communicate with similar openings 41.

The intermediate portion of the cylinder 29 is formed with the radial air escape openings 42 that afiord communication between the interior of the cylinder and the atmosphere outside of said cylinder, and this arrangement of the passages is clearly shown in Figure 4.

A piston 43 is arranged for reciprocatory movement within the cylinder 29 and the upper portion of this piston is formed with a cavity 44 to receive the spring pressed pop valve 36 and its cage or mount 47, when the piston is moved upwardly in the cylinder by the action of the expansible coil spring 45 that is arranged within the lower portion of the cylinder 29 for disposition between the bottom of the cylinder and the bottom of the piston 43. In the normal position of the iston, the same covers the compressed air inlet ports or o enings 40.

A shell 46 t at is open at its respective ends is detachably secured at its lower end in the bell shaped extension 43, and a head 47 is arranged on the top of this shell to provide a closure therefor, said head being formed with a lateral liquid discharge nipple 48 to which a suitable pipe may be connected.

The head 47 is formed in its central ortion with a vertically disposed neck 49 t at exthat is normall tends through the top of said head and terminates at its upper end in the laterally disposed compressed air inlet nipple 50.

A verticall disposed sleeve 51 is arranged centrally wit in the shell 46, the lower end thereof being threaded from the socket 34 formed in the top of the cylinder 29, while the upper end of this sleeve is threaded into the lower end of the neck 39. The valve forming ring 52 encircles the sleeve 51 and normally rests on the top of the cylinder 29 for closing the upper ends of the liquid discharge passages 38.

In the operation of this particular form of pump, compressed air enters through the nipple and passes downwardly through the neck 49 and the sleeve 51 and when the air is sufiiciently compressed to open the pop valve 36, the air will then enter the cylinder 29 and will force the piston 43 downwardly whereby to uncover the opening 40 so that compressed air will enter the passages 39 and will pass out through the openings 41. The compressed air leaves the lower portion of the cylinder through the nipple 30 and enters the pipe 31, so that the compressed air will act on the liquid in the chamber 26, to force the same upwardly through the passages 38. The liquid that passes upwardly through the passages 38 unseats the ring valve 52 and will enter the shell 46 from which it is discharged under pressure through the outlet nipple 48.

Attention is now directed to Figures 6 and 7 of the drawings, wherein there is shown still a further modification of the compressed air pump.

In this instance, the liquid chamber is denoted by the reference character 53, the same being open at its respective ends. The head 54 is secured on the lower end of the chamber 53 and is provided with a liquid inlet 55 closed by a gravity actuated valve 56. his valve 56 serves the same purpose as the valves 3 and 28 heretofore descri ed.

A cylinder 57 is secured at its lower en on the upper end of the liquid chamber 53 and the bore of the cylinder is arranged eccentrically as clearly shown in Figure 7. The bottom of the cylinder 57 is formed with a compressed air outlet opening 58.

A compressed air chamber 59 is arranged on the u per end of the cylinder 57. The upper en of the cylinder 57 is formed with a compressed air port 60. I

The cylinder is formed with a longitudinally extending li uid passage 61 that extends for the full lengt of the cylinder and this passage is formed in the thickened portion of the cylinder as shown in Figure 7 Extending around the bore 62 of the cylinder 57 are the compressed air passages 63 formed in the wall of the cylinder, the upper ends of these passages terminating at the intermediate portion of the cylinder having communication with inlet openings 64, while the lower ends .of. these air passages 63' communicate with the discharge ports or openings 65, as indicated in Figure 6. f

Arranged for reciprocatory movement within the cylinder bore 62 is the piston 66, the same being normally maintained in a raised position by means of the expansible coil spring 65. In this normal position, the piston closes the port or inlet openings 64. However, when the compressed air forces the piston 66 downwardly to such extent as to uncover the openings 64, the compressed air will enter the passages 63, and will subsequently enter the chamber 53, to force the liquid in the chamber into the lower end of the pipe 67,1that is arranged within-the chamher, and which pipe has its upper end threaded in the lower end of the passage 61. Asuit+ able valve 68 is arranged in the cap 69, se-

cured on the lower end of the pipe 67, to prevent the return of the li uid from the pipe 67 to the chamber 53. A ischarge pipe 70 ex tends through the air chamber 59 and has its lower end threaded into the upper end of the liquid passage 61. 7 a

It Will thus be seen from the foregoing description that I have provided a compressed air pump that will, at all times, be positive and efiicient in carrying out the purposes for which it is designed, and due to its simplicity of construction, the parts can be readily and easily assembled or disassembled whenever necessary.

\Vhile I have shown the preferred embodiment of my invention, it is to be understood that various changes in the size, shape. and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the appended claims.

Having thus described my invention, what I claim as new is:

1. A compressed air pump comprising a pair of tandem cylinders having communicating ends, one of said cylinders having a valved water inlet and the other cylinder having a valved compressed air inlet, said other cylinder having its wall provided with longitudinally extending water passages having communication with the water inlet cylinder, said other cylinder being also provided with interiorly and longitudinal air passages extending between and communicating with the upper and lower portions respectively of the cylinders, a reciprocatory piston within said other cylinder, a spring supporting the said piston and positioning the same within the cylinder so as to normally close the inlet end of the said air passages, and a water receiving chamber carried by said other cylinder and having valved communication with the outlet ends of the said water passages.

2. A com ressed air pump comprising a pair of tan em. cylinders having communicating ends, one of said cylinders having a water inlet, a valve controlling said inlet, the other of said cylinders having a compressed air inlet, a spring pressed pump valve controlling said compressed air inlet, said other cylinder having its wall provided with longitudinally extending water passages having communication with the water inlet cylinder, said other cylinder being also provided with interiorly and longitudinal air passages extending between and communicatin with the upper and lower portion respective y of said cylinder, a reciprocatory iston within said other 0 linder, for normal y closing the inlet ends 0 said air passa es, and means'for resiliently controlling t e movement of said piston when the latter under pressure is moved to uncover the inlet openings of said air passages for maintaining said piston above the outlet ends of said air passages and a water receiving chamber carried by said other cylinder and having communication with the outlet ends of the said water passa es. 1

n testimony whereof I afiix m signature,

CLAUD C. RTIN. 

